Windows does not detect a second CD-ROM drive due to drive letter.
Cause:
One CD-ROM drive uses real-mode drivers; the other CD-ROM drive uses protected-mode drivers. Windows 95 assumes that the real- and protected-mode drivers are for the SAME CD-ROM drive when it starts. Both CD-ROM drives are assigned the same drive letter, and ONLY the CD-ROM drive that uses protected-mode drivers is visible.
Solution:
Assign a different drive letter to the CD-ROM that uses protected-mode drivers.
1) Click the 'Start' button to display the 'Start' menu.
2) Select 'Settings' and select 'Control Panel'. (The 'Control Panel' window appears.)
Control Panel
3) Double-click the 'System' icon . (The 'System Properties' dialog box appears.)
System icon
4) Click the 'Device Manager' tab.
5) Double-click 'CDROM' to expand the branch.
6) Select the CD-ROM and click 'Properties'. (The CD-ROM drive 'Properties' dialog box appears.)
7) Click the 'Settings' tab.
8) Select the drive letter to use from the 'Start drive letter' drop-down list box.
CD-ROM Properties dialog box
9) Select the same drive letter (used in step 8) from the 'End drive letter' drop-down list box.
NOTE: Be sure to select a drive letter that is different from the second CD-ROM drive and ALL other drives on the computer, including regularly mapped network drives.
10) Click 'OK'.
11) Click 'OK' to close 'System Properties' dialog box.
12) Click the 'Start' button to display the 'Start' menu and select 'Shut Down...'. (The 'Shut Down Windows' dialog box appears.)
13) Select the 'Restart the computer' radio button and click 'Yes'.
